SLUAA11B February   2020  – August 2021 BQ769142 , BQ76922 , BQ76942 , BQ76952

 

  1.   Trademarks
  2. 1Direct Commands
    1. 1.1 Alarm Enable - 0x66
    2. 1.2 Cell 1 Voltage - 0x14
    3. 1.3 Internal Temperature - 0x68
    4. 1.4 CC2 Current - 0x3A
  3. 2Subcommands
    1. 2.1 DEVICE_NUMBER - 0x0001
    2. 2.2 MANUFACTURING STATUS - 0x0057
    3. 2.3 FET_ENABLE - 0x0022
    4. 2.4 RESET - 0x0012
  4. 3Reading and Writing RAM Registers
    1. 3.1 Read 'Enabled Protections A'
    2. 3.2 Enter CONFIG_UPDATE Mode
    3. 3.3 Write 'Enabled Protections A'
    4. 3.4 Write 'VCell Mode'
    5. 3.5 Exit CONFIG_UPDATE Mode
  5. 4I2C With CRC
  6. 5SPI With CRC Examples
    1. 5.1 Direct Command Example: Alarm Enable - 0x66
    2. 5.2 Direct Command Example: Cell 1 Voltage - 0x14
    3. 5.3 Subcommand Example: Device Number - 0x0001
    4. 5.4 Subcommand Example: FET_ENABLE - 0x0022
    5. 5.5 Subcommand Example: RESET - 0x0012
    6. 5.6 RAM Register Read Example: Enabled Protections A
    7. 5.7 RAM Register Write Example: Enabled Protections A
  7. 6Simple Code Examples
  8. 7References
  9. 8Revision History

3.4 Write 'VCell Mode'

Next, write to the VCell Mode register to configure the device BQ76942 for 9 cells. The following example writes 0x037F to 0x9304 and then writes the new checksum and length to 0x60/0x61.

Table 3-3 VCell Mode Description
Class Subclass Name Type Min Max Default Unit
Settings Configuration VCell Mode H2 0x0000 0xFFFF 0x0000 Hex
GUID-1D7E8200-CBC4-4BF2-B01F-B97361768B2F-low.png Figure 3-4 Captured I2C Waveform for Writing VCell Mode